| original |
Oligocene |
|
Canada(British Columbia) |
Rouse,G.E. et al. A palynological and geochronological investigation of Mesozoic and Cenozoic rocks in the Chilcotin-Nechako Region of Central British Columbia. (In: Frontier Geoscience Program Cordilleran and offshore Basins, British Columbia) |
1990 |
| original |
Middle Eocene |
|
Canada(Yukon) |
Sweet,A.R. et al. High latitude Eocene/Oligocene palynoflorals: Climatic induced floristic change comparable to that between the Maastrichtian and Paleocene in Western Canada. |
1994 |
| original |
Middle Eocene |
Early Oligocene |
Canada(Yukon) |
Ridgway,K.D. et al. Climatically induced floristic changes across the Eocene - Oligocene transition in the northern high latitudes, Yukon Territory, Canada. |
1995 |